/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:40:17,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:40:17,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:40:17,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 16:40:17,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 16:40:17,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 16:40:17,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 16:40:17,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 16:40:17,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 16:40:17,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 16:40:17,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 16:40:17,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 16:40:17,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:40:17,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:40:17,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:40:17,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:40:17,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:40:17,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:40:17,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:40:17,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:40:17,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:40:17,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:40:17,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:40:17,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:40:17,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 16:40:17,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 16:40:17,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 16:40:17,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 16:40:17,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 16:40:17,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-23 16:40:17,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 16:40:17,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 16:40:17,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 16:40:17,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 16:40:17,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 16:40:17,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 16:40:17,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 16:40:17,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 16:40:17,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:40:17,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:40:17,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:40:17,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:40:17,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:40:17,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:40:17,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:40:17,154 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:40:17,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:40:17,156 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:40:17,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:40:17,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:40:17,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:40:17,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:40:17,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:40:17,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:40:17,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:40:17,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:40:17,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:40:17,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:40:17,158 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:40:17,158 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:40:17,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:40:17,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:40:17,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:40:17,366 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:40:17,369 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:40:17,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-23 16:40:17,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7979b34a/48b7fea797e34a06925a4013310024c0/FLAG3f75adbda [2022-02-23 16:40:17,789 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:40:17,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-02-23 16:40:17,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7979b34a/48b7fea797e34a06925a4013310024c0/FLAG3f75adbda [2022-02-23 16:40:17,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7979b34a/48b7fea797e34a06925a4013310024c0 [2022-02-23 16:40:17,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:40:17,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:40:17,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:40:17,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:40:17,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:40:17,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:40:17" (1/1) ... [2022-02-23 16:40:17,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151ad6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:17, skipping insertion in model container [2022-02-23 16:40:17,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:40:17" (1/1) ... [2022-02-23 16:40:17,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:40:17,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:40:17,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-02-23 16:40:17,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:40:17,959 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:40:17,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-02-23 16:40:17,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:40:18,015 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:40:18,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18 WrapperNode [2022-02-23 16:40:18,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:40:18,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:40:18,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:40:18,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:40:18,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:40:18,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:40:18,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:40:18,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:40:18,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:40:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:18,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 16:40:18,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 16:40:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:40:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:40:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:40:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 16:40:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:40:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:40:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:40:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:40:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:40:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:40:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:40:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:40:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:40:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:40:18,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:40:18,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:40:18,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:40:18,198 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:40:18,199 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:40:18,274 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:40:18,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:40:18,280 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 16:40:18,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:40:18 BoogieIcfgContainer [2022-02-23 16:40:18,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:40:18,282 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:40:18,282 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:40:18,283 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:40:18,286 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:40:18" (1/1) ... [2022-02-23 16:40:18,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:40:18 BasicIcfg [2022-02-23 16:40:18,298 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:40:18,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:40:18,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:40:18,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:40:18,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:40:17" (1/4) ... [2022-02-23 16:40:18,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dad41f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:40:18, skipping insertion in model container [2022-02-23 16:40:18,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:40:18" (2/4) ... [2022-02-23 16:40:18,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dad41f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:40:18, skipping insertion in model container [2022-02-23 16:40:18,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:40:18" (3/4) ... [2022-02-23 16:40:18,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dad41f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:40:18, skipping insertion in model container [2022-02-23 16:40:18,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:40:18" (4/4) ... [2022-02-23 16:40:18,305 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.cJordan [2022-02-23 16:40:18,309 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:40:18,309 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:40:18,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:40:18,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 16:40:18,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:40:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 16:40:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 16:40:18,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:18,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:18,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash 447419557, now seen corresponding path program 1 times [2022-02-23 16:40:18,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:18,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377818429] [2022-02-23 16:40:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:18,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:18,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:18,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377818429] [2022-02-23 16:40:18,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377818429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:40:18,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:40:18,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 16:40:18,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342278593] [2022-02-23 16:40:18,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:40:18,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 16:40:18,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 16:40:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:40:18,579 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:18,622 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-02-23 16:40:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 16:40:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 16:40:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:18,637 INFO L225 Difference]: With dead ends: 21 [2022-02-23 16:40:18,637 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 16:40:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 16:40:18,644 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:18,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:40:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 16:40:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 16:40:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-23 16:40:18,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-23 16:40:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:18,670 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-23 16:40:18,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-23 16:40:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 16:40:18,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:18,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:18,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:40:18,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:18,680 INFO L85 PathProgramCache]: Analyzing trace with hash 448343078, now seen corresponding path program 1 times [2022-02-23 16:40:18,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:18,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283591520] [2022-02-23 16:40:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:18,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:18,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:18,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283591520] [2022-02-23 16:40:18,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283591520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:40:18,855 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:40:18,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:40:18,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955795132] [2022-02-23 16:40:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:40:18,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:40:18,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:40:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:40:18,860 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:18,915 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-02-23 16:40:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:40:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-23 16:40:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:18,916 INFO L225 Difference]: With dead ends: 17 [2022-02-23 16:40:18,916 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 16:40:18,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:40:18,918 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:18,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:40:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 16:40:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-23 16:40:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-23 16:40:18,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-02-23 16:40:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-23 16:40:18,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-23 16:40:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 16:40:18,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:18,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:18,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:40:18,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1516694440, now seen corresponding path program 1 times [2022-02-23 16:40:18,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:18,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572087691] [2022-02-23 16:40:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:19,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:19,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572087691] [2022-02-23 16:40:19,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572087691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:19,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695734360] [2022-02-23 16:40:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:19,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:19,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:19,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:40:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 16:40:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:19,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:19,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695734360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:19,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:19,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-02-23 16:40:19,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149795074] [2022-02-23 16:40:19,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 16:40:19,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 16:40:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-23 16:40:19,312 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:19,448 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-23 16:40:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:40:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 16:40:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:19,450 INFO L225 Difference]: With dead ends: 24 [2022-02-23 16:40:19,450 INFO L226 Difference]: Without dead ends: 24 [2022-02-23 16:40:19,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-23 16:40:19,454 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:19,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:40:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-23 16:40:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-23 16:40:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-23 16:40:19,465 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-02-23 16:40:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:19,466 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-23 16:40:19,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-23 16:40:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 16:40:19,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:19,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:19,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:40:19,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:19,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1579293370, now seen corresponding path program 1 times [2022-02-23 16:40:19,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:19,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539141725] [2022-02-23 16:40:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:40:19,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:19,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539141725] [2022-02-23 16:40:19,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539141725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:19,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234570611] [2022-02-23 16:40:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:19,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:19,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:19,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:19,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:40:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:40:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:40:19,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 16:40:20,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234570611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:20,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:20,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-02-23 16:40:20,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695861710] [2022-02-23 16:40:20,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:20,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 16:40:20,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 16:40:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-23 16:40:20,121 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:20,330 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-23 16:40:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:40:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-23 16:40:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:20,332 INFO L225 Difference]: With dead ends: 34 [2022-02-23 16:40:20,332 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 16:40:20,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-02-23 16:40:20,334 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:20,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:40:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 16:40:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-02-23 16:40:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-23 16:40:20,339 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-02-23 16:40:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:20,339 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-23 16:40:20,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-23 16:40:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 16:40:20,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:20,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:20,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:40:20,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 16:40:20,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash -888303194, now seen corresponding path program 2 times [2022-02-23 16:40:20,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:20,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962884271] [2022-02-23 16:40:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:20,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:20,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:20,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962884271] [2022-02-23 16:40:20,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962884271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:20,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38840420] [2022-02-23 16:40:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:40:20,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:20,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:20,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:40:20,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:40:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 16:40:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:21,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:21,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38840420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:21,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:21,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-02-23 16:40:21,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739450805] [2022-02-23 16:40:21,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:21,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:40:21,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:21,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:40:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:40:21,183 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:21,679 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-23 16:40:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 16:40:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-23 16:40:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:21,681 INFO L225 Difference]: With dead ends: 42 [2022-02-23 16:40:21,681 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 16:40:21,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2022-02-23 16:40:21,682 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:21,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 16:40:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 16:40:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-23 16:40:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-02-23 16:40:21,686 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-02-23 16:40:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:21,686 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-02-23 16:40:21,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-02-23 16:40:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 16:40:21,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:21,688 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:21,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 16:40:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:21,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -443899610, now seen corresponding path program 2 times [2022-02-23 16:40:21,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:21,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248936952] [2022-02-23 16:40:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 16:40:22,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:22,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248936952] [2022-02-23 16:40:22,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248936952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:22,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871673146] [2022-02-23 16:40:22,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:40:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:22,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:22,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:22,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 16:40:22,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:40:22,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 16:40:22,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 16:40:22,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 16:40:22,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871673146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:22,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:22,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 16:40:22,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089884332] [2022-02-23 16:40:22,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:22,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:40:22,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:40:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:40:22,413 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:24,161 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-02-23 16:40:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:40:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-23 16:40:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:24,163 INFO L225 Difference]: With dead ends: 60 [2022-02-23 16:40:24,163 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 16:40:24,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:40:24,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:24,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 48 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:40:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 16:40:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-02-23 16:40:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-02-23 16:40:24,169 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2022-02-23 16:40:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:24,170 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-02-23 16:40:24,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-02-23 16:40:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 16:40:24,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:24,171 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:24,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 16:40:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:24,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -556846618, now seen corresponding path program 3 times [2022-02-23 16:40:24,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:24,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185113420] [2022-02-23 16:40:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:24,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:24,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185113420] [2022-02-23 16:40:24,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185113420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:24,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357759271] [2022-02-23 16:40:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:40:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:24,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:24,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 16:40:24,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 16:40:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:24,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 16:40:24,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 16:40:24,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 16:40:24,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357759271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:40:24,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 16:40:24,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-23 16:40:24,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505613369] [2022-02-23 16:40:24,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:40:24,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 16:40:24,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 16:40:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:40:24,876 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:24,920 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-02-23 16:40:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:40:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-23 16:40:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:24,922 INFO L225 Difference]: With dead ends: 60 [2022-02-23 16:40:24,923 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 16:40:24,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-23 16:40:24,924 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:24,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 16:40:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 16:40:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-02-23 16:40:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-02-23 16:40:24,932 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 41 [2022-02-23 16:40:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:24,932 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-02-23 16:40:24,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-02-23 16:40:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-23 16:40:24,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:24,933 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:24,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 16:40:25,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:25,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -236436009, now seen corresponding path program 3 times [2022-02-23 16:40:25,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:25,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257310691] [2022-02-23 16:40:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:25,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:25,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257310691] [2022-02-23 16:40:25,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257310691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:25,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635003722] [2022-02-23 16:40:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:40:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:25,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 16:40:25,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 16:40:25,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 16:40:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 16:40:25,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-02-23 16:40:25,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635003722] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:25,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:25,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-02-23 16:40:25,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966637779] [2022-02-23 16:40:25,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:25,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 16:40:25,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 16:40:25,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-02-23 16:40:25,959 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:40:27,259 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-02-23 16:40:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 16:40:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-23 16:40:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:40:27,261 INFO L225 Difference]: With dead ends: 79 [2022-02-23 16:40:27,261 INFO L226 Difference]: Without dead ends: 79 [2022-02-23 16:40:27,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2022-02-23 16:40:27,262 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:40:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 62 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 16:40:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-23 16:40:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-02-23 16:40:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-02-23 16:40:27,267 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 56 [2022-02-23 16:40:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:40:27,268 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-02-23 16:40:27,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:40:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-02-23 16:40:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 16:40:27,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:40:27,269 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:40:27,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 16:40:27,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:27,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:40:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:40:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1430063529, now seen corresponding path program 4 times [2022-02-23 16:40:27,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:40:27,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321350831] [2022-02-23 16:40:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:40:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:40:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:27,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:40:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:40:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:40:27,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:40:27,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321350831] [2022-02-23 16:40:27,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321350831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:40:27,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028107084] [2022-02-23 16:40:27,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 16:40:27,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:40:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:40:27,806 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:40:27,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 16:40:27,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 16:40:27,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:40:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-23 16:40:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:40:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:28,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:40:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:40:29,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028107084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:40:29,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:40:29,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 47 [2022-02-23 16:40:29,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952518316] [2022-02-23 16:40:29,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:40:29,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-23 16:40:29,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:40:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-23 16:40:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 16:40:29,512 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:41:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:41:38,076 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-02-23 16:41:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-23 16:41:38,076 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-23 16:41:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:41:38,078 INFO L225 Difference]: With dead ends: 153 [2022-02-23 16:41:38,078 INFO L226 Difference]: Without dead ends: 153 [2022-02-23 16:41:38,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=2121, Invalid=5710, Unknown=1, NotChecked=0, Total=7832 [2022-02-23 16:41:38,080 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 16:41:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 119 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 16:41:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-23 16:41:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-02-23 16:41:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:41:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-02-23 16:41:38,088 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 74 [2022-02-23 16:41:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:41:38,088 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-02-23 16:41:38,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:41:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-02-23 16:41:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-23 16:41:38,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:41:38,090 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:41:38,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 16:41:38,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:41:38,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:41:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:41:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1642783383, now seen corresponding path program 5 times [2022-02-23 16:41:38,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:41:38,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441598095] [2022-02-23 16:41:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:41:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:41:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:41:39,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:41:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:41:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 597 proven. 2667 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 16:41:39,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:41:39,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441598095] [2022-02-23 16:41:39,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441598095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:41:39,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452882390] [2022-02-23 16:41:39,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 16:41:39,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:41:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:41:39,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 16:41:39,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 16:45:22,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2022-02-23 16:45:22,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:45:22,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 98 conjunts are in the unsatisfiable core [2022-02-23 16:45:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:45:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:45:24,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:45:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:45:29,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452882390] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:45:29,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:45:29,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 142 [2022-02-23 16:45:29,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210162459] [2022-02-23 16:45:29,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:45:29,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-23 16:45:29,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:45:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-23 16:45:29,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4778, Invalid=15244, Unknown=0, NotChecked=0, Total=20022 [2022-02-23 16:45:29,460 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 142 states, 142 states have (on average 2.964788732394366) internal successors, (421), 141 states have internal predecessors, (421), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:45:35,583 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~y~0 4294967296))) (and (let ((.cse0 (mod (+ 38 c_main_~x~0) 4294967296))) (or (not (< .cse0 .cse1)) (not (<= 5000000 .cse0)))) (let ((.cse2 (mod (+ 2 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse2)) (not (< .cse2 .cse1)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse3 (mod (+ 3 c_main_~x~0) 4294967296))) (or (not (< .cse3 .cse1)) (not (<= 5000000 .cse3)))) (let ((.cse4 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (<= 5000000 .cse4)) (not (< .cse4 .cse1)))) (let ((.cse5 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse5)) (not (< .cse5 .cse1)))) (let ((.cse6 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse6)) (not (< .cse6 .cse1)))) (let ((.cse7 (mod (+ 9 c_main_~x~0) 4294967296))) (or (not (< .cse7 .cse1)) (not (<= 5000000 .cse7)))) (let ((.cse8 (mod (+ 45 c_main_~x~0) 4294967296))) (or (not (< .cse8 .cse1)) (not (<= 5000000 .cse8)))) (let ((.cse9 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse9)) (not (< .cse9 .cse1)))) (let ((.cse10 (mod (+ 40 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse10)) (not (< .cse10 .cse1)))) (let ((.cse11 (mod (+ 10 c_main_~x~0) 4294967296))) (or (not (< .cse11 .cse1)) (not (<= 5000000 .cse11)))) (let ((.cse12 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse12 .cse1)) (not (<= 5000000 .cse12)))) (let ((.cse13 (mod (+ 41 c_main_~x~0) 4294967296))) (or (not (< .cse13 .cse1)) (not (<= 5000000 .cse13)))) (let ((.cse14 (mod (+ 6 c_main_~x~0) 4294967296))) (or (not (< .cse14 .cse1)) (not (<= 5000000 .cse14)))) (let ((.cse15 (mod (+ 30 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse15)) (not (< .cse15 .cse1)))) (let ((.cse16 (mod (+ 36 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse16)) (not (< .cse16 .cse1)))) (let ((.cse17 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse17 .cse1)) (not (<= 5000000 .cse17)))) (let ((.cse18 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse18 .cse1)) (not (<= 5000000 .cse18)))) (let ((.cse19 (mod (+ 25 c_main_~x~0) 4294967296))) (or (not (< .cse19 .cse1)) (not (<= 5000000 .cse19)))) (let ((.cse20 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse20)) (not (< .cse20 .cse1)))) (let ((.cse21 (mod (+ 35 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse21)) (not (< .cse21 .cse1)))) (let ((.cse22 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse22 .cse1)) (not (<= 5000000 .cse22)))) (let ((.cse23 (mod (+ 43 c_main_~x~0) 4294967296))) (or (not (< .cse23 .cse1)) (not (<= 5000000 .cse23)))) (let ((.cse24 (mod (+ 39 c_main_~x~0) 4294967296))) (or (not (< .cse24 .cse1)) (not (<= 5000000 .cse24)))) (let ((.cse25 (mod (+ 13 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse25)) (not (< .cse25 .cse1)))) (let ((.cse26 (mod (+ c_main_~x~0 27) 4294967296))) (or (not (< .cse26 .cse1)) (not (<= 5000000 .cse26)))) (let ((.cse27 (mod (+ c_main_~x~0 11) 4294967296))) (or (not (< .cse27 .cse1)) (not (<= 5000000 .cse27)))) (let ((.cse28 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse28 .cse1)) (not (<= 5000000 .cse28)))) (let ((.cse29 (mod (+ 42 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse29)) (not (< .cse29 .cse1)))) (let ((.cse30 (mod (+ 12 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse30)) (not (< .cse30 .cse1)))) (let ((.cse31 (mod (+ 4 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse31)) (not (< .cse31 .cse1)))) (let ((.cse32 (mod (+ 16 c_main_~x~0) 4294967296))) (or (not (< .cse32 .cse1)) (not (<= 5000000 .cse32)))) (let ((.cse33 (mod (+ 23 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse33)) (not (< .cse33 .cse1)))) (let ((.cse34 (mod (+ 17 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse34)) (not (< .cse34 .cse1)))) (let ((.cse35 (mod (+ c_main_~x~0 1) 4294967296))) (or (not (<= 5000000 .cse35)) (not (< .cse35 .cse1)))) (let ((.cse36 (mod (+ 19 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse36)) (not (< .cse36 .cse1)))) (let ((.cse37 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse37 .cse1)) (not (<= 5000000 .cse37)))) (let ((.cse38 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse38 .cse1)) (not (<= 5000000 .cse38)))) (not (<= 5000000 (mod c_main_~x~0 4294967296))) (let ((.cse39 (mod (+ 8 c_main_~x~0) 4294967296))) (or (not (< .cse39 .cse1)) (not (<= 5000000 .cse39)))) (let ((.cse40 (mod (+ 7 c_main_~x~0) 4294967296))) (or (not (< .cse40 .cse1)) (not (<= 5000000 .cse40)))) (let ((.cse41 (mod (+ 44 c_main_~x~0) 4294967296))) (or (not (< .cse41 .cse1)) (not (<= 5000000 .cse41)))) (let ((.cse42 (mod (+ c_main_~x~0 37) 4294967296))) (or (not (< .cse42 .cse1)) (not (<= 5000000 .cse42)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse43 (mod (+ 5 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse43)) (not (< .cse43 .cse1)))) (let ((.cse44 (mod (+ 28 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse44)) (not (< .cse44 .cse1)))) (let ((.cse45 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse45 .cse1)) (not (<= 5000000 .cse45)))) (let ((.cse46 (mod (+ 46 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse46)) (not (< .cse46 .cse1)))))) is different from false